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2,4-Dichlorophenoxyacetic acid derived Schiff base (HL) and its lanthanide [La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Dy(III), Y(III)] complexes were synthesized and characterized by various spectroscopic ( 1 H, 13 C, DEPT and 2D HMQC NMR, FT-IR, �V-Vis, and mass) techni�ues and other analytical methods. HL exhibits �E� and ��� isomerism and was con�rmed by variable temperature 1 H NMR studies. e spectral and analytical data reveals the bidentate coordination of HL to lanthanide(III) ion, through carboxylic acid group via deprotonation. Fluorescence spectrum of europium complex shows bands at 578, 592, and 612 nm assignable to 5 D0 → 7 F0, 5 D0 → 7 F1, and 5 D0 → 7 F2, respectively. Auxin activity of HL and lanthanum(III) complex on wheat seeds (Triticum durum) was measured at different concentrations. e percentage germination, root length, and shoot length were recorded. An enhancement in the plant growth activity of the ligand was observed on complexation and the best activity was observed at 10 −6 M concentration.

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The present investigation was conducted with the main objective of studying the extent of genetic variability released through recombination, induced mutation and their combination for yield and its attributing traits in tetraploid wheat. The material consisted of segregating populations (F 2 , M 2 and F 2 M 2) developed from Triticum dicoccum wheat variety DDK1025 and T. durum wheat variety HD4502 after subjecting to EMS and γ γ γ γ γ-rays treatment. Among mutagen treated populations γ γ γ γ γ-rays induced more reduction in germination and survival percentage and mean plant height than EMS. Analysis of variance revealed highly significant differences among the populations for all the characters studied. An upper limit of range was more in M 2 compared to F 2 and F 2 M 2 populations for all the characters except for days to 50% flowering and number of productive tillers/ plant. In general, the γ γ γ γ γ-rays irradiated populations recorded highest PCV and GCV for all the characters except for plant height, spike length and spikelets/spike indicating greater scope for selection and improvement of these characters in desired direction. Most of the characters exhibited high heritability except spike length in all segregating populations. In general, the number of favorable correlations and higher strength of positive correlations were appeared to be more in F 2 M 2 populations than both F 2 and M 2 populations. The number of potential genotypes varied considerably across the traits and the populations. The F 2 M 2 (γ γ γ γ γ) population showed higher number of potential progeny lines compared to F 2 , F 2 M 2 (EMS) and M 2 populations. This indicated greater possibility of generation of potential genotypes through irradiation in heterozygous condition than EMS.